With highly efficient IE3* submersible motors the pumps of the Amarex KRT® series are a true innovation on the market. KSB’s extremely energy-efficient motors can be integrated into pump stations as standard. The pump sets can be supplied with or without explosion protection

KSB’s in-house development work has enabled these pump sets to be mechanically and electrically optimised for the special requirements of waste water transport. The Amarex KRT motors’ electrical and magnetic design fulfils the requirements of the IE3* efficiency class up to a drive rating of 850 KW.

Combining these motors with a wide range of hydraulic systems for handling waste water enables KSB to provide pump sets offering superb efficiency and dependable operation for every application. Save energy effectively

Design

Applications

Handling of all types of abrasive or aggressive waste water in water and waste water engineering as well as industry, especially untreated sewage containing long fibres and solid substances, fluids containing gas / air, as well as raw, activated and digested sludge; sea water desalination.

Pump sets of installation types P and S

are designed for continuously submerged operation. The motor is cooled by the fluid
handled on the motor surface. Operation with the motor outside the fluid handled is
possible for short periods.

Pump sets of installation type K

are suitable for continuous operation with the motor outside the fluid. Cooling is
effected by means of air convection.

Function

The fluid enters the pump axially via the inlet of the pump casing (1) and is
accelerated outward in a radial flow by the rotating impeller (2). The required energy
is transmitted from the electric motor (7) to the impeller (2) via the shaft (4). In the
pump casing (11) the kinetic energy of the fluid is converted into pressure energy.
The rotational movement diverts the fluid flow in axial direction. The casing wear
ring (12) prevents any fluid from flowing back from the casing into the inlet of the
pump casing. At the rear side of the impeller, the shaft enters the casing via the
discharge cover (3). The shaft passage through the discharge cover is sealed towards
the fluid by a shaft seal (10). The shaft runs in rolling element bearings (5 and 8),
which are supported by a bearing housing (9) and a bearing bracket (6).

Standard

▪ Temperature monitoring of the motor
▪ Temperature monitoring at the lower bearing
▪ Leakage monitoring of the mechanical seal system
▪ Leakage sensors in the motor/connection space

Function

The fluid enters the pump axially via a suction nozzle (6) and is accelerated outward
in a cylindrical flow by the rotating impeller (7). The flow profile of the pump casing
converts the kinetic energy of the fluid into pressure energy. The fluid leaves the
pump via the discharge nozzle (2).
The casing is fitted with a replaceable wear plate (1). The diagonal clearance gap
prevents frequent deviation of the flow in the clearance gap heading in the direction
of the suction nozzle. This ensures a longer service life if solids-laden fluids are
handled.
The casing is closed by a discharge cover (3). The shaft (5) enters the casing via this
discharge cover. A shaft seal (8) provides reliable sealing towards the atmosphere.
The shaft is supported by oil-lubricated rolling element bearings (9). The motor (10) is
connected to the casing via an intermediate lantern (4)

Drinking water production in RO systems requires a high-pressure pump of top reliability which provides continuously economical operation. KSB responds to this need with an ideal solution: the HGM-RO high-pressure pump.

High-pressure pumps HGM-RO High-pressure pumps for reverse osmosis systems need to be able to handle the harsh conditions which prevail in seawater desalination plants.

KSB has opted for radially split high-pressure pumps.

Their radially split design makes HGM-RO high-pressure pumps particularly robust, enabling them to cope with the extreme conditions of drinking water treatment in seawater desalination.

Minimum energy input, low operating costs

Compact design

Internal, product-lubricated plain bearings with a short bearing span ensure smooth running and therefore high pump availability and reliability as well as a long service life of wear parts.

Corrosion-resistant design

The HGM-RO high-pressure pump is made of duplex or super duplex stainless steels. Its corrosion-resistant design (e.g. dry shaft) translates into a long service life.

Low monitoring requirements

There is no need for an additional lubrication system, and the pump does not require any vibration or bearing temperature monitoring. This saves both initial and operating costs for the pump set.

Minimum maintenance costs

Because of its axial inlet, the HGM-RO high-pressure pump has just one mechanical seal, which minimises spare parts costs. The ring section design ensures top reliability in the extreme conditions of reverse osmosis systems. No lubrication systems are required. The mechanical seal is easy to replace.

Reduced construction costs

The pump’s compact design, low weight and smooth running lower the requirements to be met by the foundation. Flexible connection branches facilitate connection to the system piping.

Easier to install and dismantle than axially split pumps

The pump can be dismantled and reassembled from either side. The wear parts are easily accessible.